Supply-valve.



No. 723,698. :PATENTED MAR524, 1903.

I E. A. MARSH.

SUPPLY VALVE.

APPLICATION FILED AUG. 13. 1902.

N0 MODEL.

WITNESSES k I NVE N 70B By @M/M wa /#71 Attorneys.

m: NORRIS PETERS cu. PNOTD-LITHQ. WASNING'TON, n. 1:.

UNITED STATES ATENT FFICE.

ELON A. MARSH, OF DETROIT, MICHIGAN.

SU PPLY-VALVE.

SE'EGIFICATION forming part of Letters Patent No. 723,698, dated March 24, 1903.

Application filed August 13,, 1902. Serial No. 119,483. (No model.)

To all whom it may concern:

Be it known that I, ELON A. MARSH, acitizen of the United States, residing at Detroit, county of Wayne, State of Michigan, haveinvented a'certain new and useful Improvementin Supply-Valves; and I declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to supply-valves for filling tanks or cisterns; and it has for its object a simple automatically-acting valve that will control with practical accuracy the quantity of Water passing through it in a given time irrespective of the pressure on the supply side-that is, practically the same amount of water will be delivered in a unit of time whether the pressure be high or low. I do not mean to say that the amount will be accurately measured, but that the deviation from a stated amount will be so small as to be practically unimportant.

In the drawings, Figure 1 is a vertical section of the valve and the attached float. Fig. 2 is a detail of the piston-cylinderemployed. Fig. 3 isadetail of the piston-valve employed. Fig. 4 is a plan View of the top end of the valve and easing.

2 indicates thewater-inletpipe, which is to be connected to any suitable source of sup ply for water.

3 is the passage leading directly to the nozzle or valve orifice ct.

The end of the pipe2 is contracted, and on the external surface of the pipe, near the end, is seated a plate or spider 4 on the shoulder A of the pipe. The part of the pipe which is immediately next to the end of the nozzle is externally cylindrical throughout that part of it over whichthe piston-disk G (herein-' after spoken of) reciprocates. The range of such reciprocation is short.

B indicates a cylinder that rests on the plate 4 and is secured thereto by any suitable means-as, for example, by a screw d. The top of the cylinder B is closed in except for a central opening through which engages the stem U of a valve D. Provision is made for the escape of water from the cylinder B,

and the escape-passages are located below the piston-disk C, and, as shown in the drawings, the passageslead through the side walls of the cylinder.

rests on this valve-seat. The stem U of the valve .D extends through a central aperture in the cover-plate or end plate of the cylinder B, and from the stem U extend arms 0, that support at their outer extremities a piston-disk O, that isbored centrally to engage over the cylindrical part of the nozzleend of the pipe 2, and the piston-valve engages loosely in the cylinder B-that is, there is or may be some freedom for the escape of water around the periphery of the pistondisk or between the pipe and the edges of the hole. Provision is to be made for the escape of water either at these places or by means of holes through the disk, and the provision for the escape of water is to be made with reference to the amount of water that is required for a given period of time. p

The upper end of the valve-stem U is suitablyconnected to a float-lever E, that supports a float F. This connection may be in any one of various ways. As shown in the drawings, the rock-arm e engages in a notch in the stern U. The rock-arm is pivoted on brackets D, that rise from the cylinder B, and opposite the rock-arm e is the float-arm, which-supports the float F. The leverage is arranged to lift the valve from it when the float ceases to be supported by water and be- The end of the pipe is arranged as a valve-seat,and a flat valve D comes a weight and to close the valve on its seat when the water in the tank lifts the float. In action the pressure of the water in the pipe 2 tends to push the valve from its seat,

and the weight of the float tends to lift the valve from its seat. The two coact. As soon as the valve rises from its seat Water enters the chamber in the cylinder B, and the pres-. sure acting on-the piston 0 tends to'close the valve toward its seat; but as the orifice closes the Water entering the piston-chamber is reduced in quantity and the closing pressure that acts on the piston O is reduced and the action and reaction produces an equilibrium whose determinant factors are the capacity for escape of water past the piston O and the valve, and these having been regulated for a definite passage of water the amount delivered corresponds closely thereto irrespective of the pressure in the pipe 2. There is always a high pressure in the pipe 2, a reduced pressure in the cylinder B, and either no pressure at all or a low pressure outside the cylinder B-no pressure at all when there is a free escape for all the Water that emerges and low pressure when the structure is so located in the tank that there is water surrounding the cylinder. The chamber within the cylinder becomes thus one of intermediate pressure between the high pressure in the pipe 2 and the low pressure that is outside the structure.

What I claim is- 1. In a pressure-reducing supply-valve, acylinder containing an intermediate-pressure chamber, a passage arranged to deliver water into said chamber, a piston arranged to be actuated by water in the intermediate-pressure chamber, a valve connected with said piston arranged to regulate the inflow into said chamber, the valve and the piston being arranged to be oppositely actuated, the valve by high pressure, and the piston by intermediate pressure, substantially as described.

2. In a pressure-reducing supply-valve, a valve arranged to open by force of the supplypressure and by a weight-and-lever mechanism, and to close by a float-and-lever mechanism, a piston connected to said valve, a chamber for said piston, the said chamber being provided with means for the free egress of water therefrom, on that side of the piston which is opposite the valve connected therewith, a valve-controlled orifice arranged to deliver water into the piston-chamber, a restricted outlet-passage from the chamber of substantially unvarying capacity, substantially as described.

3. In apressm'e-reducingsupply-valve, the combination ofa casing provided with a chamher, an orifice arranged to deliver a supply of water to the said chamber, an orifice of substantially un varying capacity to deliver water from said chamber, a valve arranged to regulate the capacity of the inlet-orifice, and means actuated by the pressure in said chamber for actuating said valve, substantially as described.

4. In a pressure-reducingsupply-valve, the combination of a chamber arranged to contain water at high pressure, a chamber arranged to contain water at lower pressure, a communicating passage between the two chambers, a passage leading out from the second chamber and arranged for a substantially unvarying capacity, a piston arranged to be actuated by pressure of water in the second chamber, a valve connected to said piston and arranged to regulate the orificial capacity of the passage between the two cham bers, the piston and the valve being arranged to assume a balanced condition as against the pressures of the water in the high-pressure chamber against the valve, and the water in the piston-chamber against the piston, substantially as described.

5. In a pressure-reducing valve, the combination of a valve and a piston connected therewith arranged to reciprocate in a chamber closed at one end and open at the opposite end, the peripheral walls and the closed head of the chamber constituting part of the casing and having opposed thereto the piston and a supply-orifice, a restricted outlet-passage from the chamber and a float and suitable connections therewith, substantially as described.

In testimony whereof I sign this specification in the presence of two witnesses.

ELON A. MARSH.

Witnesses:

MAY E. KOTT, LOTTA LEE HAYTON. 

